Ready to introduce new flock to old?

I have 9 in the Coop and 9 new ones who I have kept seperate in a pen in my Truck. They don't look sick - they seem ok.

They have been here a week and the new ones and old ones have been checking each other out (the truck is parked right next to the coop door)_ -

Someone on a previous post said to keep them seperate 30 days-I would like to speed it up as it is a hassle keeping them in the bed of my truck in the barn -vs putting them in the coop with my girls. I should be more patient shouldn't I? Maybe just one more week? Or do I go for the whole 30 days.